45 lines
1.2 KiB
Plaintext
Executable file
45 lines
1.2 KiB
Plaintext
Executable file
Tegra124 CPU frequency scaling driver bindings
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----------------------------------------------
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Both required and optional properties listed below must be defined
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under node /cpus/cpu@0.
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Required properties:
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- clocks: Must contain an entry for each entry in clock-names.
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See ../clocks/clock-bindings.txt for details.
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- clock-names: Must include the following entries:
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- cpu_g: Clock mux for the fast CPU cluster.
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- cpu_lp: Clock mux for the low-power CPU cluster.
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- pll_x: Fast PLL clocksource.
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- pll_p: Auxiliary PLL used during fast PLL rate changes.
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- dfll: Fast DFLL clocksource that also automatically scales CPU voltage.
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- vdd-cpu-supply: Regulator for CPU voltage
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Optional properties:
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- clock-latency: Specify the possible maximum transition latency for clock,
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in unit of nanoseconds.
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Example:
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--------
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cpus {
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#address-cells = <1>;
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#size-cells = <0>;
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cpu@0 {
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device_type = "cpu";
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compatible = "arm,cortex-a15";
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reg = <0>;
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clocks = <&tegra_car TEGRA124_CLK_CCLK_G>,
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<&tegra_car TEGRA124_CLK_CCLK_LP>,
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<&tegra_car TEGRA124_CLK_PLL_X>,
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<&tegra_car TEGRA124_CLK_PLL_P>,
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<&dfll>;
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clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll";
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clock-latency = <300000>;
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vdd-cpu-supply: <&vdd_cpu>;
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};
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<...>
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};
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